<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>Vue 测试实例 - 菜鸟教程(runoob.com)</title>
    <script src="https://cdn.staticfile.org/vue/2.4.2/vue.min.js"></script>
</head>

<body>
    <div id="app">
        <p>{{ site }}</p>
    </div>
    <!-- computed默认只有getter,不过在需要时，你也可以提供一个setter -->
    <script>
        var vm = new Vue({
                el: '#app',
                data: {
                    name: 'Google',
                    url: 'http://www.google.com'
                },
                computed: {
                    site: {
                        // getter
                        get: function() {
                            return this.name + ' ' + this.url
                        },
                        // setter
                        set: function(newValue) {
                            var names = newValue.split(' ')
                            this.name = names[0]
                            this.url = names[names.length - 1]
                        }
                    }
                }
            })
            // 调用 setter， vm.name 和 vm.url 也会被对应更新
        vm.site = '菜鸟教程 http://www.runoob.com';
        document.write('name: ' + vm.name);
        document.write('<br>');
        document.write('url: ' + vm.url);
    </script>
</body>

</html>